7661. DIESEL. Hose & tube assy o-ring. A component which prevents a leak at the Trans Oil Cooler Line. An item used to seal the fitting between the Oil Cooler and the Oil Cooler hose. Automatic Transmission Oil Cooler O-Ring. Engine Coolant Pipe Seal. Included with: Cooler Line, Cooler Pipe, Cooler Pipe Part cannot be reused/reinstalled, Feed Line, Hose & Tube assembly, Inlet Pipe, Inlet Pipe and return Line, Inlet Tube, Oil Cooler Line, Oil Cooler Line Part cannot be reused/reinstalled, Oil filler Tube, Oil Inlet Tube, Oil outlet Tube, Oil return Tube, Outlet Pipe, Outlet Tube, Pressure Line, Pressure Tube, Return Line, Return Tube, Tube assembly.